Question

find the cube of the following 1. 216 2. 1331 3. 800 4. 9261 5. 27000 with explanation ​

Answer 1

Answer:

1. 10077696➖216
2. 2357947691➖1331
3. 512000000➖800
4. 794280046581➖9261
5. 19683000000000➖27000

Step-by-step explanation:

1. 216*216*216=10077696
2. 1331*1331*1331=2357947691
3. 800*800*800=512000000
4. 9261*9261*9261=794280049581
5. 27000*27000*27000=19683000000000

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Answer 2

Answer:

128 is not a perfect cube

Step-by-step explanation:

Q1. Which of the following numbers are not perfect cubes?

(i) 216(ii) 128(iii) 1000 (iv) 100(v) 46656

Sol. (i) We have 216 = 2 × 2 × 2 × 3 × 3 × 3

Grouping the prime factors of 216 into triples, no factor is left over.

∴ 216 is a perfect cube.

(ii) We have 128 = 2 × 2 × 2 × 2 × 2 × 2 × 2

Grouping the prime factors of 128 into triples, we are left over with 2 as ungrouped factor.

∴ 128 is not a perfect cube.